Technically, they consist of a series of lattice type modular elements of varying length formed of a tubular galvanized steel structure with devices at the ends so that they can be bolted together. These modular elements (lattice girders) rest on stilts or vertical supplements that in turn rest on legs capable of supporting loads of up to 6.3 tons. This system is used to level the table form with a tolerance of 1 cm and adjust its height with a variance of up to 1400 mm between minimum and maximum elevations.

These legs have two safety mechanisms to prevent the tables from dropping suddenly by accident and every two legs are tied together with a lattice type beam. The limits reached by Dragados in their works are 16 meters long, 4.5 meters wide and 11.50 meters high. All the tables are fit with guardrails, walkways, netting, etc. In other words, they have their own safety system.

A large part of the elements forming these tables are under French patent belonging to Hussor. However, based on the great experience gained from using them, Dragados has designed over the years many additional elements that have resulted in noteworthy improvements in the application and versatility of this system.